Final answer:
The last three proclaimed Doctors of the Church share the distinction of making significant contributions to Catholic theology and doctrine through their remarkable writings and teachings.
Step-by-step explanation:
The last three individuals proclaimed Doctors of the Church all share the common trait of having made significant contributions to the theological and doctrinal body of the Catholic Church through their writings and teachings. The designation "Doctor of the Church" is an honor given by the Catholic Church to certain saints whose writings or teachings are considered to offer outstanding guidance to the faithful. The common factors among these individuals include their sanctity, esteemed scholarship, and the approval of their work by the Church to serve as authentic expressions of Catholic doctrine.